Luther Burbank, his methods and discoveries and their practical application; prepared from his original field notes covering more than 100,000 experiments made during forty years devoted to plant improvement . sfer this pollen to thereceptive pistil of another flower either with thefinger tip—which furnishes in general the mostuseful piece of apparatus—or with a camels hairbrush. It is desirable to cover the receptive portion(stigma) of the pistil fully with pollen, partlyto ensure complete fertilization, and partly toprevent the vitiation of the experiment throughpossible subsequent deposits
Luther Burbank, his methods and discoveries and their practical application; prepared from his original field notes covering more than 100,000 experiments made during forty years devoted to plant improvement . sfer this pollen to thereceptive pistil of another flower either with thefinger tip—which furnishes in general the mostuseful piece of apparatus—or with a camels hairbrush. It is desirable to cover the receptive portion(stigma) of the pistil fully with pollen, partlyto ensure complete fertilization, and partly toprevent the vitiation of the experiment throughpossible subsequent deposits of pollen fromanother source. If the flower to be fertilized has stamens ofits own, these should be removed before they arefully ripe—which is often a few hours, or a daybefore the foreign pollen should be applied. Thisremoval of the stamens may usually be donewith a pair of small pincers. In case of flowersthat have short pistils—the cherry, apple, andother orchard fruits being good examples—theunopened flower bud may be cut around at aboutthe middle, with a thin-bladed knife, the anthersbeing thus excised at a single stroke. With otherflowers the mechanical details vary, of course; but [94]. Corn SelJ-Pollenated and Crossed With Teosinte The upper ear is an ordinary ear oj corn, presentingno marked peculiarities. The lower ear was developed bvpollenizing the corn silk with pollen from the primitive type of corncalled teosinte, which is illustrated on earlier pages oJ the presentvolume. The influence oJ the pollen-parent is clearlyshown in the modi Red form of the kernels. Withmost plants the pollen does not directlyeffect the fruit, but corn is an excep-tion in this regard. LUTHER BURBANK the process is seldom complicated. It calls forcommon sense rather than for great ingenuity. So-called composite flowers, however, requirespecial treatment. The daisy and the sunflowerare familiar examples. Here the true flowers arevery small and grouped in masses. Individualtreatm
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